Dear Forum,I have been using an Arduino Uno and a Critical Velocity 15 Amp Bidirectional PWM Motor Speed Controller to control a 12V 10 AMP motor. Things have been running perfectly until I added a SparkFun Large Servo to the Arduino. Now the motor will not run in reverse. SparkFun suggests a separate power supply for the servo or noise filtering. I have a robust 12V power supply for the Motor Controller. Rather not add another 5V supply for the servo. Any suggestions on how to add the servo without throwing a wrench in to the soup? Greatly appreciated.

Some members are "against" regulators like that because they waste power.

In a 7805 style regulator, the input current is always the same as the output current, so since it's at a higher voltage, the difference in input - output voltage, times the current, is the wasted power in watts.

Some members are "against" regulators like that because they waste power.

In a 7805 style regulator, the input current is always the same as the output current, so since it's at a higher voltage, the difference in input - output voltage, times the current, is the wasted power in watts.

That waste manifests as heat.....

Thank you JimboZA. Would you agree that it is a power problem and not a noise problem ? Do you have a alternate recommendation from the 7805 regulator?Thanks again for your assistance.